Chlamydia trachomatis Serology in Women with and without Ovarian Cancer

Table 3

Frequencies and adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for chlamydial elementary bodies, categorized by quartiles, in case and control subjects. (ORs were adjusted for age, education, family history of ovarian cancer, tubal ligation, nulliparity/any parity, and years of oral-contraceptive use.)

	Chlamydia EB
EB quartiles	Case subjects	Control subjects	OR (95% CI)
<0.06	133	189	1.0
0.06–0.11	133	189	1.1 (0.8–1.5)
0.11–0.24	146	176	1.2 (0.9–1.7)
≥0.25	109	212	0.7 (0.5–1.1)